The lives of people with intellectual disabilities is undergoing considerable change at the turn of the 21st century. There are dramatic developments in prevention, treatment and service provision. This book brings together health and social issues related to areas of mental health, ageing and life span, biological and behavioural issues, challenging behaviour and offending, communication and social issues, empowerment, rights and ethics, families and parents, quality of life and spirituality, and finally policy, populations and service systems.